NDLI: Mitigating error propagation in CDMA multiuser DFE

Content Provider	IEEE Xplore Digital Library
Author	Zhi Tian
Copyright Year	2001
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Michigan Technol. Univ., Houghton, MI, USA (Zhi Tian)
Abstract	Robust measures via constraining the filter weight vector are applied to the decision-directed decision feedback equalization (DFE) detectors to alleviate the error propagation problem in CDMA wireless systems. These constraints are constructed from the spreading codes of the desired user to preserve its output energy. The constrained portion of the weight vector is able to curb the effect of incorrect past decisions and provide the leverage to prevent error propagation and maintain a stable transmission. The use of signal-preserving constraints also improves the multiple access interference suppression capacity. Efficient adaptive RLS algorithms for nonlinear DFE filters are developed, and the achievable steady state SINR performance of both the unconstrained and constrained DFE is derived.
Starting Page	424
Ending Page	428
File Size	467600
Page Count	5
File Format	PDF
ISBN	078037147X
ISSN	10586393
DOI	10.1109/ACSSC.2001.986963
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Decision feedback equalizers Interference constraints Robustness Detectors Multiple access interference Resonance light scattering Adaptive filters Steady-state Signal to noise ratio
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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